Ice & Water Guard is a tough, pliable sheet membrane designed to prevent moisture penetration and interior damage from water back up caused by roof ice dam buildup during the winter season or by wind driven rain. Can be installed in new construction or during a re-roofing under shingles, slate, tile, metal and shakes and is compatible with accepted roofing materials. It consists of bituminous resins modified with synthetic resins. This SBS modified rubberized asphalt is reinforced with an exceptionally strong inert reinforcement to withstand puncture and severe stress. The reinforcement is a non-woven fabric which assists in sealing around nails and screws. The preformed membrane provides effective waterproofing over a wide temperature range. The membrane is tacky on both sides to provide good bonding characteristics to both the substrate and the roof covering.